DS question on probability

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r_walid: Senior | Next Rank: 100 Posts; Posts: 43; Joined: Wed Jan 21, 2009 2:24 pm; Thanked: 1 times

DS question on probability

by r_walid » Sun Nov 01, 2009 4:08 pm

what is the prob that a randomly selected studenti is male with brown hair?

1-) 1/3 of students have brown hair
2-) 1/2 students are male.

Please detail your reasoning.

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Source: Beat The GMAT — Data Sufficiency | Sun Nov 01, 2009 4:08 pm

sunnyjohn: Master | Next Rank: 500 Posts; Posts: 344; Joined: Mon Sep 14, 2009 5:40 am; Thanked: 28 times; Followed by:3 members; GMAT Score:700

by sunnyjohn » Sun Nov 01, 2009 7:18 pm

IMO:C

P = Probability of choosing Male AND probability of choosing brown hairs.

1/2*1/3 = 1/6

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Harbinder: Junior | Next Rank: 30 Posts; Posts: 19; Joined: Fri Oct 23, 2009 5:59 pm; Thanked: 2 times

by Harbinder » Sat Nov 07, 2009 8:30 am

IMO E what's OA

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